Claims
- 1. A data storage system connectable to a host unit which issues data read/write requests to the data storage system, the data storage system comprising:
a plurality of disc units; and a controller connected to the disc units; wherein a fault can occur in any of the disc units; wherein the disc units store data in a plurality of data groups and error correcting data corresponding to each of the data groups; wherein the controller performs processing of reconstructing data stored in any of the disc units in which a fault has occurred based on all other data belonging to any of the data groups to which the data to be reconstructed belongs and error correcting data corresponding to any of the data groups to which the data to be reconstructed belongs, and performs processing of data read/write requests from the host unit; and wherein the controller is operable in a first mode wherein the processing of reconstructing data has priority over the processing of data read/write requests, and a second mode wherein the processing of data read/write requests has priority over the processing of reconstructing data.
Priority Claims (1)
Number |
Date |
Country |
Kind |
03-094728 |
Apr 1991 |
JP |
|
CROSS-REFERENCES TO RELATED APPLICATIONS
[0001] This present application is a continuation of U.S. application Ser. No. 09/712,171, filed Nov. 15, 2000; which is a continuation of application Ser. No. 09/162,444, filed Sep. 29, 1998, now U.S. Pat. No. 6,161,194; which is a continuation of Ser. No. 08/895,886 filed on Jul. 17, 1997, now U.S. Pat. No. 5,941,993; which is a continuation of application Ser. No. 08/534,841, filed Sep. 27, 1995, now U.S. Pat. No. 5,889,938; which is a continuation of application Ser. No. 07/859,850, filed Mar. 30, 1992, now U.S. Pat. No. 5,495,572, the contents of which are incorporated herein by reference.
Continuations (5)
|
Number |
Date |
Country |
Parent |
09712171 |
Nov 2000 |
US |
Child |
10610759 |
Jul 2003 |
US |
Parent |
09162444 |
Sep 1998 |
US |
Child |
09712171 |
Nov 2000 |
US |
Parent |
08895886 |
Jul 1997 |
US |
Child |
09162444 |
Sep 1998 |
US |
Parent |
08534841 |
Sep 1995 |
US |
Child |
08895886 |
Jul 1997 |
US |
Parent |
07859850 |
Mar 1992 |
US |
Child |
08534841 |
Sep 1995 |
US |